From: Dave Hansen <dave.hansen@intel.com>
To: Jarkko Sakkinen <jarkko@kernel.org>, linux-sgx@vger.kernel.org
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/5] x86/sgx: Use sgx_free_epc_page() in sgx_reclaim_pages()
Date: Wed, 3 Mar 2021 08:59:17 -0800 [thread overview]
Message-ID: <b223ea92-8b20-def3-7bd0-2cc44474bd78@intel.com> (raw)
In-Reply-To: <20210303150323.433207-3-jarkko@kernel.org>
On 3/3/21 7:03 AM, Jarkko Sakkinen wrote:
> diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
> index 52d070fb4c9a..ed99c60024dc 100644
> --- a/arch/x86/kernel/cpu/sgx/main.c
> +++ b/arch/x86/kernel/cpu/sgx/main.c
> @@ -305,7 +305,6 @@ static void sgx_reclaim_pages(void)
> {
> struct sgx_epc_page *chunk[SGX_NR_TO_SCAN];
> struct sgx_backing backing[SGX_NR_TO_SCAN];
> - struct sgx_epc_section *section;
> struct sgx_encl_page *encl_page;
> struct sgx_epc_page *epc_page;
> pgoff_t page_index;
> @@ -378,11 +377,7 @@ static void sgx_reclaim_pages(void)
> kref_put(&encl_page->encl->refcount, sgx_encl_release);
> epc_page->flags &= ~SGX_EPC_PAGE_RECLAIMER_TRACKED;
>
> - section = &sgx_epc_sections[epc_page->section];
> - spin_lock(§ion->lock);
> - list_add_tail(&epc_page->list, §ion->page_list);
> - section->free_cnt++;
> - spin_unlock(§ion->lock);
> + sgx_free_epc_page(epc_page);
> }
> }
In current upstream (3fb6d0e00e), sgx_free_epc_page() calls __eremove().
This code does not call __eremove(). That seems to be changing
behavior where none was intended.
Was this, perhaps, based on top of Kai's series that changes the
behavior of sgx_free_epc_page()?
next prev parent reply other threads:[~2021-03-05 17:38 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-03 15:03 [PATCH v3 0/5] x86/sgx: NUMA Jarkko Sakkinen
2021-03-03 15:03 ` [PATCH v3 1/5] x86/sgx: Fix a resource leak in sgx_init() Jarkko Sakkinen
2021-03-03 16:56 ` Dave Hansen
2021-03-10 15:00 ` Jarkko Sakkinen
2021-03-10 15:49 ` Sean Christopherson
2021-03-10 21:52 ` Jarkko Sakkinen
2021-03-03 15:03 ` [PATCH v3 2/5] x86/sgx: Use sgx_free_epc_page() in sgx_reclaim_pages() Jarkko Sakkinen
2021-03-03 16:59 ` Dave Hansen [this message]
2021-03-10 15:11 ` Jarkko Sakkinen
2021-03-10 15:55 ` Dave Hansen
2021-03-10 21:56 ` Jarkko Sakkinen
2021-03-10 20:36 ` Kai Huang
2021-03-10 22:10 ` Jarkko Sakkinen
2021-03-10 22:12 ` Jarkko Sakkinen
2021-03-10 22:35 ` Jarkko Sakkinen
2021-03-10 22:43 ` Kai Huang
2021-03-10 22:52 ` Kai Huang
2021-03-03 15:03 ` [PATCH v3 3/5] x86/sgx: Replace section->init_laundry_list with a temp list Jarkko Sakkinen
2021-03-03 18:02 ` Dave Hansen
2021-03-10 14:50 ` Jarkko Sakkinen
2021-03-03 15:03 ` [PATCH v3 4/5] x86/sgx: Replace section->page_list with a global free page list Jarkko Sakkinen
2021-03-03 23:48 ` Dave Hansen
2021-03-10 10:54 ` Jarkko Sakkinen
2021-03-03 15:03 ` [PATCH v3 5/5] x86/sgx: Add a basic NUMA allocation scheme to sgx_alloc_epc_page() Jarkko Sakkinen
2021-03-04 0:20 ` Dave Hansen
2021-03-10 11:30 ` Jarkko Sakkinen
2021-03-10 15:44 ` Dave Hansen
2021-03-10 21:48 ` Jarkko Sakkinen
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